RKT vs IBKR Comparison

Rocket Companies is a financial services company that was originally founded as Rock Financial in 1985 and is currently based in Detroit. Rocket Companies offers a wide array of services and products but is best known for its Rocket Mortgage business. The company's mortgage lending operations are split between its direct-to-consumer lending, which sees borrowers accessing the company's lending arm directly through either its mobile app or website, and its partner network where mortgage brokers and other firms use Rocket's origination process to offer loans to their customers. The company has rapidly gained market share in recent years and will also be the largest mortgage servicer in the US following its acquisition of the Mr. Cooper Group.

Interactive Brokers is a large, automated, retail and institutional brokerage that boasted nearly $780 billion in customer equity at the end of 2025. The company cut its teeth as a market maker, introducing US financial markets to automated and algorithmic training before expanding into brokerage services in 1993. The firm has a wide-ranging client base, with its best-in-class order execution and extremely low margin lending rates catering to a sophisticated audience of hedge funds, proprietary traders, and introducing brokers that account for about 45% of the firm's commissions. With operations spanning more than 170 electronic exchanges, 40 countries, and 29 currencies, Interactive Brokers caters to a global clientele, with more than 80% of active accounts sitting outside the US.